Intelligent disk array controller background surface analysis
CA 2047406 A1 · Owner: Compaq Computer Corporation · Inventors: Pfeffer, Scott M.; Schultz, Stephen M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for performing background disk sector Analysis for drives, including drives dedicated to redundancy and/or fault recovery techniques in an, intelligent, microprocessor based disk array. The method directs the microprocessor to wait a specified time and test for disk activity. In the absence of disk activity, the disk controller is directed to generate a read request for a disk memory location within the array. A return code following the array is checked to determine if the read failed indicating a, disk drive media failure. The disk controller is then notified if a failure occurs. The processor again checks for disk array activity and in the absence of activity issues a read …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 19, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.